Mounting for booms and sails



Nov. 29, 1927. r 1,650,759

L. J. LARSEN MOUNTING FOR BOOMS AND SAILS Filed Feb. 5. 1927 Inc;

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maritime son BOOKS AND SAIIJS.

Application filer]. Fe ruary which is most suitable fOlFtllG prevailingweather or wind. Fol-example, when there is a strong wind blowinguit isdesirable that the sail used be ofaa flat type, that is, one which willh'ave only a slight curvature when filled, whereas in alight wind it isusual to employya sail the curvature or draught of which, when filled,is greater than that of the so-cal-led fiat sail. a

Also, the connections, which are at present being used to join thelower: endofthe fore edge of a mainsail to the mast, aresuch that it isvery diiiicult attimes to maintainthe full lengthof said fore edge inparallel relation to the mast. l 1 .i

An object of' the present invention is to provide a mounting of siinale" and practical construction by means of which sail may be adjustedrelative to its-mast and boomto vary the curvature'of the sail, "whenfilled, thereby avoiding the necessity of changing from one sail toanother to meet existing weather conditions.

Another object is in providing an adjustment for the sail whereby thefore edge and foot or lower edge thereof throughout their entire lengthsinay belzept in parallel relation to the mastand hooni,respectively,thus insuring-the proper positioninghf the sail under all conditions. 4a

A further object is the provisionflof an improved mountingwhich willallow of -free swinging movements of the boom both 'verti cally andlaterally relative to the mast.

The above and other objects will appear more clearly from thefollowing-detail description, when talrenin connection with theaccompanying drawing, which illustrates a preferred embodimentoftheinventive idea.

. In the'drawing 1 s 1 Figure 1 is a side elevation of the mountingconstructed in accordance with the invention and shown in its operativeposition;

Figure 2 is a top plan view of 'themountingwith the sail unattachedyand1 i ure- 3 is a sect' Figure 1.

{OH entire line of 5, 1927. Serial No. 166,055.

Referring more particularly to the accompanying drawing, the numeral 4:indicates the mast of a sailing boat and 5 the usual boom to which theinainsail 6 is connected.

The mounting of the present invention oonsists'of a bracket 7 securedtothe mast 4 and having a bearing portion 8 provided with an opening 9theretlnough, which opening is disposed co-extensively with the mast. Asupporting member 10, in the form of an arm, is provided at one end witha lateral extension 11 which is mounted in'the ope'ning 9cso as to forma pivot for the member 10 to pernnt of the sainet'o be swung about avertical axis and laterally with respectto the mast 4. The other end ofthe support 10 is also providedwith'alateral extension 12terminating atits extremity in aney'e 13 through which isextended a pin 14: in theform of a bolt, the eye bein g'engaged with the intermediate portion ofsaid pin. To connect the boom 5 with the pin in order that th'e formermay have vertical movements about said pin as a pivot, there is providedayoke 15 having a screw threaded shank 16 which is screwed into the endof the boom 5,'as shownin Figure 1. Thus from the foregoing descriptionit will be apparent that through the pivotal connection of the supportlOWllZli the mast and the similar connection of the boom with saidsupport, said boom will have pivotal movements both laterally andvertically relative to said mast.

The mounting further comprises a means 7 for adjus'tahly securing thesail 6 thereto, said means consisting of'the opposed clamping-plates 17,adjacent ends of which are provided with openings for receiving'the pin14 with the plates arranged on opposite sides of the eye 13 and betweenthe same and the arms of the yoke 15. The opposite ends of said platesare likewise provided with openings for receiving a pin 18 similar tothe pin 14, which pin 18 also extends through an eye 19 formed upon theextremity of the extension 11. The plates 17 are capable of movementstoward and away from each other on the pins 14 and 18 so asto be capableof clampingtherebetween the end 20 of a sail attaching member 21. Theinner surfaces of the plates andthe surfaces of said end 20 are milledor serrated so that when the clamping plates are engaged with saideiid'the same will be seem-91 held to 'g'e'tl'ie'r after the wing nut "22 hasbeen threaded upon the bolt 23 and engaged with part thereof, may becaused to extend coextensively with the boom 5.

The intermediate portion of the attaching member 21 is disposedtransversely to the end 20 and has extending therefrom in a directionopposite to the end 20 an otl'set end 26 terminating at its extremity inthe yoke 27 between the arms of which is adapted to be disposed theadjacent corner of the sail 6. In order to connect said sail to the yokethe arms of the latter are provided with opposed openings 28 into one ofwhich projects a pin 29. A locking bolt 30 is extended through theopenings 28 and has therein a bayonetslot 31 in which is engageable theend of the pin 29. The bolt is provided with ahead 32 which is capableof being given a quarter. turn so that the pin 29 will engage in-thelongitudinal portion of the slot- 31 and'thus permit of a partialwithdrawal of thebolt from the yoke, thereby allowing of the insertionof the corner ofthe sail between the arms of said yoke. The bolt is thenreplaced to its locking position, extend ing through an eye 33 formed inthe sail so that the sailwill be attached tothe member .21. p In ordertoinsure the locking bolt remaining in its locking position with the head32extending downwardly, ashort length of V rope (not shown) may be tiedto the head vious that said member 21 may be adjusted longitudinally ofthe plates 17 and away from the mast 4 to vary, within certain limits,the curvature which the sail 6' will assume when it is filled.

If desired, there may be interposed between the top of the bearing 8 andthe lower edges of the plates 17 a split washer 35 which [encircles theextension 11 to take up wear between the parts.

What is claimed is: 1. A mounting for booms and sails including asupporting member capable of attachment to a mastfor swinging movementabout an axisparallelthereto, opposed clamping plates carried by saidsupportin member and movable toward and away trom each other, means forpivotally connecting a boom to said supporting member for movement in avertical direction, and a sail attaching member held between said platesand having longitudinal and transverse adjustments relative thereto.

2. A mounting for booms and sails including a supporting member capableof attachment to a mast for swinging movementabout an axis parallelthereto, opposed clamping plates carried by said supporting member andhaving longitudinal slots therein, means for pivotally connecting a boomto said supporting member for movement in a vertical direction, a sailattaching member held between said plates and having slots therein whichextend transversely of and intersect the slots in said clamping plates,and means extending through the slots in'said plates and sail attachingmember for securing the latter in different adjusted positionslongitudinally and transversely of said plates.

3. A mounting for booms and sails including a supporting member capableof attachment to a mast tor swinging movement about .an axis parallelthereto, opposed clamping plates carried by said supportin member andmovable toward and away rom each other, means for pivotally connecting aboom to said supporting member for movement in a vertical direction, asail attaching member having one end thereof disposed between saidclamping plates and its other end bifurcated to receive a portion of a.sail therebetween, and a locking device mounted in said bifurcated endand engageable with said sail to releasably connect the same to saidattaching member.

4. A mounting for booms and sails including a supporting member capableof attachment to a mast for swinging movement about an axis parallelthereto, opposed clamping plates carried by said supporting member andmovable toward and away from each other, means for pivotally connectinga boom to said supporting member for movement in a vertical direction, asail attaching member having one end thereof disposed between saidclamping plates and its other end bifurcated to receive a portion of asail there between, a locking device mounted in said bifurcated end andengageable with said sail to releasably connect the same to saidattachmg member, and means for adjusting said attaching member bothlongitudinally and transversely of said clamping plates. 5. A mountingfor booms and sails, includmg a supporting member having a lateralextension at one end forming a pivot for the member capableof attachmentto a mast to permit said member to swing laterally relative thereto,said supporting member having another lateral extension at its otherend,

connecting pins mounted transversely in the extensions of said member,clamping plates carried by said pins and movable thereon toward and awayfrom each other,cmeans joined to one of said pins for pivotallyconnecting a boom thereto for vertical movements, and a sail attachingmember held between said plates and having longitudinal and transverseadjustments relative thereto.

6. A mounting for booms and sails includ ing a supporting member havinga lateral extension at one end forming a pivot for the member capable ofattachment to a mast to permit said member to swing laterally relativeto the mast, said member having another lateral extension at its otherend, connecting pins mounted transversely in the extensions of saidmember, clamping plates carried by said pins and movable thereon towardand away from eacheother, said plateshaving longitudinal slots therein,means forpivotally connecting a boom to one of said pins for verticalmovements, a sail attaching member held between said plates and havingslots therein which intersect the slots in said clamping plates, andmeans extending through slots in said plates and sail attaching memberand engageable with said plates to secure the sail attaching memberthereto.

In testimony whereof I have affixed my signature.

LOUIS J. LARSEN.

